<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表格</title>
</head>
<body>
<table border="1" cellspacing="0" width="50%" align="center" bgcolor="#dcdcdc">
    <tr align="center">
    <th>编号</th>
    <th>姓名</th>
    <th>成绩</th>
    </tr>

    <tr align="center">
        <td>1</td>
        <td>小龙女</td>
        <td>100</td>
    </tr>

    <tr align="center">
        <td>2</td>
        <td>杨过</td>
        <td>50</td>
    </tr>
</table>
</body>
</html>